Ultraviolet Imaging Spectroscopy shows an active saturnian system

被引：100

作者：

Esposito, LW

Colwell, JE

Larsen, K

McClintock, WE

Stewart, AIF

Hallett, JT

Shemansky, DE

Ajello, JM

Hansen, CJ

Hendrix, AR

West, RA

Keller, HU

Korth, A

Pryor, WR

Reulke, R

Yung, YL

机构：

[1] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80303 USA

[2] Univ So Calif, Los Angeles, CA 90089 USA

[3] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[4] Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany

[5] Cent Arizona Coll, Coolidge, AZ 85228 USA

[6] Univ Stuttgart, Inst Photogrammetry, D-70174 Stuttgart, Germany

[7] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA

来源：

SCIENCE | 2005年 / 307卷 / 5713期

关键词：

D O I：

10.1126/science.1105606

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Neutral oxygen in the Saturnian system shows variability, and the total number of oxygen atoms peaks at 4 x 10(34). Saturn's aurora brightens in response to solar-wind forcing, and the auroral spectrum resembles Jupiter's. Phoebe's surface shows variabie water-ice content, and the data indicate it originated in the outer solar system. Saturn's rings also show variable water abundance, with the purest ice in the outermost A ring. This radial variation is consistent with initially pure water ice bombarded by meteors, but smaller radial structures may indicate collisional transport and recent renewal events in the past 10(7) to 10(8) years.

引用

页码：1251 / 1255

页数：5

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